CAN COMMUNICATION SYSTEM


  1. OUTLINE


    1. The Controller Area Network (CAN) is a serial data communication network for real time application. It is a multiplex communication network equipped in a vehicle, and has communication speeds of 500 kbps (HS-CAN) and 250 kbps (MS-CAN), and the ability to detect malfunctions.

    2. The HS-CAN consists of the V bus, bus 1, bus 2, bus 3, bus 4, bus 5 and sub bus 2.

    3. The communication wire used is a twisted-pair wire. The bus line has a high line (2.5 V to 3.5 V of voltage is applied) and a low line (1.5 V to 2.5 V of voltage is applied).

    4. The MS-CAN consists of the sub bus 1.

    5. The terminating resistors for each bus are located as shown in the following table.

      Speed Communication Bus Terminating Resistor Location Gateway Function Gateway Destination
      High-speed (HS-CAN) CAN V Bus Network Gateway ECU Network Gateway ECU to each bus
      CAN Bus 1 Network Gateway ECU Network Gateway ECU to each bus
      CAN Bus 2

      • Network Gateway ECU

      • ECM

      		 Network Gateway ECU to each bus
      CAN Bus 3 Network Gateway ECU Network Gateway ECU to each bus
      CAN Bus 4

      • Network Gateway ECU

      • Airbag Assembly

      		 Network Gateway ECU to each bus
      CAN Bus 5

      • Network Gateway ECU

      • Combination Meter Assembly

      		 Network Gateway ECU to each bus
      Main Body ECU (Multiplex Network Body ECU) Sub Bus 1
      CAN Sub Bus 2

      • Brake Actuator Assembly(Skid Control ECU)

      • CAN No. 2 Junction Terminal

      		 - -
      Middle-speed (MS-CAN) CAN Sub Bus 1

      • Main Body ECU (Multiplex Network Body ECU)

      • CAN No. 1 Junction Terminal

      		 Main Body ECU (Multiplex Network Body ECU) Bus 5